API T12 Tube Mic Preamp KU4 We recommend that the unit

We recommend that the unit should be calibrated at least once a year

Ribbon Element Warranty: One Year

Switchable 48-volt phantom power

CMRR: > 100 dB @ <= 1 kHz

With portable

API T12 Tube Mic Preamp KU4 We recommend that the unitThe API Select T12 is a classic 2 channel, all tube, Class A microphone preamplifier designed with APIs proprietary AP2516 transformer in the input stage and a custom API transformer on the output stage. Built with 12AT7WC and 12BH7 dual triode vacuum tubes, the T12 represents a new and exciting variation in APIs preamplifier technology and provides the user with unique tonal options. The T12 can handle a wide range of production applications